Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Filter Icon

Filters article

Years

FAQ Arrow
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

31,377 Article Results

Automated brain tumor segmentation and classification for MRI analysis system

10.11591/ijeecs.v15.i3.pp1337-1344
Norhashimah Mohd Saad , Muhamad Faizal Yaakub , Abdul Rahim Abdullah , Nor Shahirah Mohd Noor , Nur Azmina Zainal , Wira Hidayat Mohd Saad
This paper proposed a new analysis technique of brain tumor segmentation and classification for Fluid Attenuated Inversion Recovery (FLAIR) Magnetic Resonance Images (MRI). 25 FLAIR MRI images were collected from online database of Multimodal Brain Tumor Segmentation Challenge 2015 (BRaTS’15).  The analysis comprised four stages which are preprocessing, segmentation, feature extraction and classification. Fuzzy C-Means (FCM) was proposed for brain tumor segmentation. Mean, median, mode, standard deviation, area and perimeter were calculated and utilized as the features to be fed into a rule-based classifier. The segmentation performances were assessed based on Jaccard, Dice, False Positive and False Negative Rates (FPR and FNR). The results indicate that FCM offered high similarity indices which were 0.74 and 0.83 for Jaccard and Dice indices, respectively. The technique can possibly provide high accuracy and has the potential to detect and classify brain tumor from FLAIR MRI database.
Volume: 15
Issue: 3
Page: 1337-1344
Publish at: 2019-09-01

Improved design of a DC-DC converter in residential solar photovoltaic system

10.11591/ijpeds.v10.i3.pp1476-1482
Mantas Darameičikas , Firdaus Muhammad Sukki , Siti Hawa Abu Bakar , Nazmi Sellami , Nurul Aini Bani , Mohd Nabil Muhtazaruddin , Abdullahi Abubakar Mas’ud , Jorge Alfredo Ardila Rey
With growing demand in renewable energy, solar photovoltaic (PV) technology is becoming more popular. A number of research has been carried out to increase the efficiency of the PV system. One of them is improving the Switch Mode Power Supplies (SMPS) performance to ensure maximum solar energy extraction. This paper looks at buck type SMPS suitability for use in solar PV installed in residential houses. The main issues that affect the response from the output are identified. The work will utilise the LT SPICE software to carry out the simulation. The primary objective of the study is to design an improved converter controller which is more robust and is able to maintain constant output. The emphasis is on good efficiency, stability and low output voltage ripple. This could be achieved by using the current mode control (CMC) techniques – an alternative design to the voltage mode control technique (VMC). Results obtained via simulations reveal strong evidence of CMC superiority over the VMC.
Volume: 10
Issue: 3
Page: 1476-1482
Publish at: 2019-09-01

Optimized neuro-PSO-based software maintainability prediction using relief features selection method

10.11591/ijeecs.v15.i3.pp1517-1526
N. Baskar , C Chandrasekar
The recent development in software engineering reveals the importance of software maintenance during the time of software development that is becoming more important in software development environment and software metrics, which are very essential for measuring the maintainability of software, software complexity, estimating size, quality and project efforts. There are various approaches through which one can estimate the software cost and predict on various kinds of deliverable items. This paper aims at developing an optimized   Neuro-PSO-based software maintainability prediction model by applying the dimensionality reduction using relief feature selection method for identifying the optimal feature subsets in order to increase the accuracy and reduce the time complexity of the prediction model. The simulation result proves the performance of the proposed model which will be more beneficial for the software developers in predicting the maintenance of the software in advance.
Volume: 15
Issue: 3
Page: 1517-1526
Publish at: 2019-09-01

Conceptual study on Grid-to-Vehicle (G2V) wireless power transfer using single-phase matrix converter

10.11591/ijpeds.v10.i3.pp1382-1388
Muhammad Qusyairi Iqbal Mohd Zamani , Rahimi Baharom , Dalina Johari
This paper presents the conceptual study on grid-to-electric vehicle (G2V) wireless power transfer (WPT) using Single Phase Matrix Converter (SPMC). In this work, the SPMC is used as a direct AC to AC converter to convert the input supply voltage at 50 Hz frequency to the output of 20 kHz to meet the WPT switching frequency operation of the transmitter and receiver coils. The high frequency AC voltage of the receiver coil is then rectified to a DC form by using SPMC. Through the proposed system, the battery of an electric car can be charged wirelessly, thus removing the annoying wires of the conventional electric vehicle charging system. The reduction in size of the charging system, power losses and optimum efficiency are among the advantages of the proposed system. MATLAB/Simulink (MLS) has been used to simulate the proposed model. Selected simulation result are presented to verify the proposed work.
Volume: 10
Issue: 3
Page: 1382-1388
Publish at: 2019-09-01

Control of the photoelectric generator for used in feeding of the independent wind turbine system

10.11591/ijpeds.v10.i3.pp1613-1627
Mohammed Kendzi , Abdelghani Aissaoui , Mohamed Abid , Ahmed Tahour
In this paper, a hybrid power system is proposed to eliminate any interruption caused to absence of power supply network by the Fusion between the wind source and the photovoltaic source to create a hybrid system with internal power supply autonomy. The hybrid power system includes a solar and wind source whose wind energy conversion system is based on a doubly fed induction generator. The photovoltaic conversion system extracts the maximum power from the sun. A part of this power is used to supply the rotor of a doubly fed induction generator; the rest is injected in the grid. The connection between the two conversion systems is made by means of static converters (chopper/inverter). In the photovoltaic conversion chain, a controller for tracking the maximum power point is designed using the direct search approach the Perturb and observe method. The wind energy conversion system contains a doubly fed asynchronous generator with a control system of generated powers by the technique of the fuzzy logic. The simulation was done to prove the validity of the strategy and of the control method used for the control of the power generated by the hybrid system.
Volume: 10
Issue: 3
Page: 1613-1627
Publish at: 2019-09-01

Identifying the mastery of research statistical concept by using problem-based learning

10.11591/ijere.v8i3.20252
Susbiyanto Susbiyanto , Dwi Agus Kurniawan , Rahmat Perdana , Cicyn Riantoni
The consequence of the assessment for the research statistics course at the department of physics Education in Universitas Jambi demonstrates the students' capacities to hold the idea of the mastery of research statistical concept is very low. It winds up one of the shortcomings for them to finish their final assignment. Therefore, the researcher examined the student's mastery of the research statistical concept by utilizing Problem-Based Learning as one of the methods that were chosen from the learning advancement. The research method is quantitative with 295 numbers of samples. Questionnaires and MCQs were used as the instruments of the research. The result had been investigated utilizing a simple regression analysis. PBL influences the mastery of research statistical concept. In 6th semester male students', the impact of PBL toward the mastery of the research statistical concept contributed 72% and 67% for female students. Meanwhile, for students at 8th semesters, the impact of PBL on the mastery of research statistical concept contributed 68% for male and 70% for female.
Volume: 8
Issue: 3
Page: 461-469
Publish at: 2019-09-01

Output energy maximization of a single axis photovoltaic solar tracking system: experimental verification

10.11591/ijpeds.v10.i3.pp1655-1661
Shin-Horng Chong , N. N. Chandren , C. R. Allan Soon
Major depletion of fossil fuel and the increase of greenhouse gasses such as carbon dioxide, chloroflurocarbons (CFCs), hydroflurocarbon (HFCs), perflurocarbons (PFCs) and Sulphur hexafluoride (SF6) worldwide are the catalyst for the interest of many counties towards renewable energy. The rising cost of electricity due to higher demand and less resource also led to the renewable energy venture. One of the most famous renewable energy is solar energy. Unfortunately, renewable energies are dependent on environment conditions, too. One of the major problems that affect the output energy of the solar panel is the cloud shadowing problem. Photovoltaic solar and wind hybrid system is capable to reduce the effects of the cloud shadowing by harvesting two different energy resources. However, the availability of wind energy harvesting has shown its instability performance. In this work, the photovoltaic solar array of the laboratory-scale single axis solar tracking system to maximize the output energy of the solar panel is examined experimentally. The solar array is connected in series and parallel configurations, and is experimented under different partical-shadowed conditions. The experimentation is done to develop a solar array that has a minimum effect towards this type of occurances. Experimental results proved that the parallel configured solar panel has showed less influence by the cloud shadowing as compared to the single one.
Volume: 10
Issue: 3
Page: 1655-1661
Publish at: 2019-09-01

Optimum design of dynamic voltage restorer for voltage sag mitigation in distribution network

10.11591/ijpeds.v10.i3.pp1364-1372
Deshpande V. Chinmay , Deshpande V. Chaitanya
DVR is power electronic based device used for mitigation of voltage sag problem. In this paper, various inverter topologies such as Voltage source inverter, Z source inverter and Embedded Z source inverter are used and compared for operation of DVR. Here dual p-q theory is implemented as control technique which have excellent transient response and speed. Different inverter configurations are implemented for DVR and its simulation results are presented and compared. It has been observed that Embedded EZ source inverter topology is found to be effective. The Embedded EZ source inverter topology and its hardware results are presented and compared.
Volume: 10
Issue: 3
Page: 1364-1372
Publish at: 2019-09-01

A novel bio- inspired algorithm for hunting in multi robot scenario

10.11591/ijeecs.v15.i3.pp1553-1563
Poorva Agrawal , Himanshu Agrawal , Vidyasagar Potdar
In a multi-robot scenario, cooperative hunting is a key issue when a group of robots are hunting for evader/evaders and when the location of the evader is continuously changing. Cooperative hunting is addressed in this paper by proposing a novel bio inspired Corner Dragging Algorithm (CDA). Corner Dragging Algorithm operates by making an alliance of robots that drag the evader towards any one of the four corners; whichever is closest to the evader. Different shapes of obstacles are avoided during this pursuit. While developing the Corner Dragging Algorithm, we analyze the shortcomings and advantages of some of the existing algorithms including dynamic alliance and formation construction algorithm and incorporate these changes in our design to achieve improved results. Performance of the algorithm is evaluated on the basis of simulation in MATLAB.
Volume: 15
Issue: 3
Page: 1553-1563
Publish at: 2019-09-01

Comparative study of two potential recuperating converters in DC railway electrification system for harmonic mitigation

10.11591/ijpeds.v10.i3.pp1157-1166
Z. H. Choi , C. L. Toh , M. H. Z. Hilmi
The regenerative braking energy produced by Light-Rail-Transit (LRT) train is commonly transferred back to power grid via a conventional three-phase inverter (recuperating converter). Although this is a cost saving solution but the ac grid current and voltage waveforms were distorted. Hence passive filters are integrated to mitigate the harmonics. This paper proposed to replace the conventional inverter system with a multilevel converter. Cascaded H-Bridge (CHB) converter and Modular Multilevel Converter (MMC) are selected to be evaluated in this paper due to their modularity structures. The aim of this study is to determine the most potential multilevel converter to be implemented without additional passive filters. Nine-level CHB and nine-level MMC converters are modeled with MATLAB/Simulink simulation tool. Both converters are modulated with Level-Shifted Pulse Width Modulation technique. The output voltage and current waveforms generated by CHB and MMC are presented with full analysis. It is concluded that MMC converter is more suitable to be used as a recuperating converter. It produces a clean voltage and current waveforms. The voltage and current Total Harmonic Distortion (THD) indexes are found approximate to 8% and 3%.
Volume: 10
Issue: 3
Page: 1157-1166
Publish at: 2019-09-01

Intelligent risk management framework

10.11591/ijai.v8.i3.pp278-285
Wissam Abbass , Zineb Bakraouy , Amine Baina , Mostafa Bellafkih
The Internet of Things (IoT) is rapidly increasing and enhancing today’s world by introducing a large set of interconnected devices. Several beneficial services are produced by these devices as for area monitoring and process control. However, IoT security is still a major problem. In fact, IoT’ security beggings largely whith an effective Risk Management process. However, the essense of this process is to acquire a risk inventory cibling the IoT devices. Nevertheless, it is quite difficult to obtaining this latter which significantly adds complication issues to the Risk Management. Without the ability of holisticly identify the IoT critical devices, inaccurate Risk Management is achieved which leads unfortunately to novel risk exposures. Traditional Riskbased approaches fails drastically at apprending IoT’ potential attacks. The dynamic structure, the heteregouns nature of devices, the various security objectives and infrastructure pervasiveness are key factors impacting the overall perfomance. Thus, a holistic Risk Management witihin the IoT is indispensable. Accordingly, we propose an intelligent Risk Management framework using Mobile Agents in order to deliver preventive and responsive assessment.
Volume: 8
Issue: 3
Page: 278-285
Publish at: 2019-09-01

Comparison of solar based closed loop DC-DC converter using PID and ANN control for shunt motor drive

10.11591/ijpeds.v10.i3.pp1324-1328
S. Jayaprakash , R. Ramani , M. Kavitha , V. Senthil Nayagam
This paper explained details of Comparison of solar based closed loop DC -DC converter using PID and ANN Control for Shunt motor drive. Solar panel output is given to full bridge converter, stepup transformer, full wave converter, ∏ filter and Shunt motor drive are connected.Comparator compare the set value and the output signal of the motor produce a signal, based on the signal, full wave conveter produce the voltage to run the motor, Speed of motor,Torque and Armature current,Rise time,Peak time, Settling time and Steady state error are measured and evaluated by experimental.A circuit operation and simulation designed for a 1000 RPM speed of shunt motor arrived and tested.
Volume: 10
Issue: 3
Page: 1324-1328
Publish at: 2019-09-01

How does portfolio assess interprofessional learning of medical and midwifery students in community-based maternal and children health care

10.11591/ijere.v8i3.20245
Bulan Kakanita Hermasari , Gandes Retno Rahayu , Mora Claramita
Top-quality maternal health care requires midwifery and medical students to work together in multidisciplinary interprofessional education (IPE). Achieving IPE learning competencies requires interprofessional assessment methods; one such is portfolio. Study on portfolio as interprofessional assessment is limited. To evaluate interprofessional core competencies illustrated by IPE portfolios. A qualitative design using content analysis to evaluate portfolios of midwifery and medical students attending three weeks’ interprofessional learning in an Indonesian university. Sixty portfolios were analyzed for four IPE core competencies. Fifteen open-ended questionnaires were collected to confirm the data and further explore issues. Four interprofessional core competencies were illustrated in portfolios. While only three portfolios contained objective evidence of learning, over two-thirds of students could plan appropriate, concrete work based on interprofessional learning. The results indicate that the portfolio assesses interprofessional learning with student reflections that illustrate the achievement of four IPE core competencies. The validity of this competency achievement is also supported and confirmed by the evidence of learning and subsequent learning plans. Furthermore, portfolios also can encourage the students to prepare a concrete and appropriate work plan or study plan for students’ interprofessional learning.
Volume: 8
Issue: 3
Page: 392-400
Publish at: 2019-09-01

Development of active power filter using rectifier boost technique

10.11591/ijpeds.v10.i3.pp1446-1453
Dygku Aniqnatasa Awg Osman , Rahimi Baharom , Dalina Johari , Muhamad Nabil Hidayat , Khairul Safuan Muhammad
The development of active power filter (APF) using rectifier boost technique has been identified to compensate for the pulsating nature of the distorted supply current waveform of non-linear load. In this work, investigation is carried out on the operation of rectifier without any filters function. This is then extended to operate the rectifier converter with an active power filter function. APF function is implemented by enabling the closed-loop control using standard proportional integral control to rectify the distorted supply current to become continuous, sinusoidal and in-phase with the supply voltage waveform. Consequently, the total harmonic distortion (THD) level was reduced to meet the acceptable limit defined in the standard of IEEE-519 1992. The selected simulation results obtained from MATLAB/Simulink are presented to justify the proposed filter structure.
Volume: 10
Issue: 3
Page: 1446-1453
Publish at: 2019-09-01

Transmission system regularization with 5-level cascaded IPFC

10.11591/ijpeds.v10.i3.pp1437-1445
Sridhar Babu Gurijala , K S Srikanth , Ramchandra Nittala , G. Rohit Reddy
In recent years, there is an immensely huge demand to power due to industrialization and modernization, butcorrespondingly the amplification of generation and transmission has not been done due to constrained resources and environmental limitations. The huge growth in demand leads to various problems in power systems. Heavy growth in semiconductor technology made power electronics plays a key role in solving these problems. Flexible AC transmission system (FACTS) devices are used for fixing various problems in power system. They are used for enhancing the existing transmission capabilities and improving the system dynamic performance so that to make transmission system flexible and efficient in operation. Inter line power flow controller (IPFC) is a latest generation series connected FACTS device, having capability of controlling power flow among multi line in a transmission network. In this paper cascaded 5 level inverter is used as the inverter module for IPFC. Control techniques play a vital role in power flow control in the system, with the main objective of minimization of harmonics and obtaining a variable output with maximum fundamental component. This paper discusses various comparative case studies on IPFC with cascaded 5 level inverter using SPWM and SVM control techniques.
Volume: 10
Issue: 3
Page: 1437-1445
Publish at: 2019-09-01
Show 1350 of 2092

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration